![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Return to home page
On This Page
State: Virginia
Waterbody ID: VAN-A30E_WLL01A02
Location: The boundaries of the condemned area are described in VDH Notice and Description of Shellfish Area Condemnation Number 001A-36, Upper Machodoc Creek, Section C, effective July 15, 2004. Portion of CBP segment POTMH.
State Waterbody Type: Estuary
EPA Waterbody Type: Bays and Estuaries
Water Size: .134
Units: square miles
Watershed Name: Lower Potomac
On This Page
- Water Quality Assessment Status
- Causes of Impairment
- Probable Sources Contributing to Impairments
- TMDLs That Apply to This Waterbody
- Previous Causes of Impairment Now Attaining All Uses
State: Virginia
Waterbody ID: VAN-A30E_WLL01A02
Location: The boundaries of the condemned area are described in VDH Notice and Description of Shellfish Area Condemnation Number 001A-36, Upper Machodoc Creek, Section C, effective July 15, 2004. Portion of CBP segment POTMH.
State Waterbody Type: Estuary
EPA Waterbody Type: Bays and Estuaries
Water Size: .134
Units: square miles
Watershed Name: Lower Potomac
Data are also available for these years: 2008
2006 Waterbody Report for Williams Creek
Click on the waterbody for an interactive map
Features
- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
- EnviroMapper for Water
- AskWATERS
- EPA WATERS Homepage
- Exchange Network
- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Water Quality Assessment Status for Reporting Year 2006
The overall status of this waterbody is Impaired.
Description of this table
| Designated Use | Designated Use Group | Status |
|---|---|---|
| Aquatic Life | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Fish Consumption | Aquatic Life Harvesting | Not Assessed |
| Migratory Fish Spawning And Nursery | Fish, Shellfish, And Wildlife Protection And Propagation | Not Assessed |
| Open-Water Aquatic Life | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Recreation | Recreation | Not Assessed |
| Shallow-Water Submerged Aquatic Vegetation | Fish, Shellfish, And Wildlife Protection And Propagation | Impaired |
| Shellfishing | Aquatic Life Harvesting | Impaired |
| Wildlife | Fish, Shellfish, And Wildlife Protection And Propagation | Good |
Causes of Impairment for Reporting Year 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Designated Use(s) | State TMDL Development Status |
|---|---|---|---|
| Aquatic Plants (Macrophytes) | Noxious Aquatic Plants | Shallow-Water Submerged Aquatic Vegetation, Aquatic Life | TMDL needed |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | Open-Water Aquatic Life, Aquatic Life | TMDL needed |
| Fecal Coliform | Pathogens | Shellfishing | TMDL needed |
| pH | pH/Acidity/Caustic Conditions | Aquatic Life | TMDL needed |
Probable Sources Contributing to Impairment for Reporting Year 2006
Description of this table
| Probable Source | Probable Source Group | Cause(s) of Impairment |
|---|---|---|
| Agriculture | Agriculture | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Atmospheric Deposition - Nitrogen | Atmospheric Deposition | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Clean Sediments | Hydromodification | Aquatic Plants (Macrophytes) |
| Industrial Point Source Discharge | Industrial | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Internal Nutrient Recycling | Natural/Wildlife | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Loss Of Riparian Habitat | Habitat Alterations (Not Directly Related To Hydromodification) | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Sediment Resuspension (Clean Sediment) | Hydromodification | Aquatic Plants (Macrophytes) |
| Source Unknown | Unknown | Dissolved Oxygen; Fecal Coliform; pH |
| Sources Outside State Juristiction Or Borders | Other | Aquatic Plants (Macrophytes); Dissolved Oxygen |
| Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) | Municipal Discharges/Sewage | Aquatic Plants (Macrophytes); Dissolved Oxygen |
TMDLs That Apply to this waterbody
Description of this table
| TMDL Document Name | TMDL Date | TMDL Pollutant Description | TMDL Pollutant Source Type | Cause(s) of Impairment Addressed |
|---|---|---|---|---|
| Williams Creek | Dec-18-2008 | Fecal Coliform | Nonpoint Source | Pathogens; Fecal Coliform |
Previous Causes of Impairments Now Attaining All Uses
Description of this table
| Cause of Impairment | Cycles Listed | WQS Attainment Date | WQS Attainment Reason | WQS Attainment Comments |
|---|---|---|---|---|
| pH | 2006, 2008 | Feb-09-2011 | Applicable WQS attained; reason for recovery unspecified. |